Image forming apparatus

Abstract

An image forming apparatus, including: a conveyance unit configured to convey a sheet on a conveyance path on which the sheet is conveyed; a first conveyance path opening member configured to open a first portion of the conveyance path; a second conveyance path opening member configured to open a second portion, which is located downstream the first portion, of the conveyance path; a sheet leading edge position detecting unit configured to detect a position of a leading edge of a stopped sheet on the conveyance path; and a determination unit configured to determine, based on a detection result of the sheet leading edge position detecting unit, one of not conveying the stopped sheet, causing the conveyance unit to convey the stopped sheet toward the first portion, and causing the conveyance unit to convey the stopped sheet toward the second portion.

What is claimed is: 
     
       1. An image forming apparatus, comprising:
 a conveyance unit configured to convey a sheet on a conveyance path on which the sheet is conveyed; 
 a first conveyance path opening member configured to open a first portion of the conveyance path by the first conveyance path opening member being opened to allow a sheet to be removed from the first portion; 
 a second conveyance path opening member configured to open a second portion downstream of the first portion of the conveyance path in a sheet conveyance direction by the second conveyance path opening member being opened to allow a sheet to be removed from the second portion; 
 a sheet leading edge position detecting unit configured to detect a position of a leading edge of a stopped sheet on the conveyance path; and 
 a determination unit configured to determine, based on a detection result of the sheet leading edge position detecting unit, one of not conveying the stopped sheet, causing the conveyance unit to convey the stopped sheet toward the first portion, and causing the conveyance unit to convey the stopped sheet toward the second portion, 
 wherein, in a case where the determination unit determines to cause the conveyance unit to convey the stopped sheet toward the first portion, the conveyance unit starts to convey the stopped sheet in association with an operation of opening the first conveyance path opening member, and 
 wherein, in a case where the determination unit determines to cause the conveyance unit to convey the stopped sheet toward the second portion, the conveyance unit starts to convey the stopped sheet in association with an operation of opening the second conveyance path opening member. 
 
     
     
       2. An image forming apparatus according to  claim 1 , further comprising a display portion configured to:
 display, in the case where the determination unit determines to cause the conveyance unit to convey the stopped sheet toward the first portion, a screen for prompting a user to open the first conveyance path opening member; and 
 display, in the case where the determination unit determines to cause the conveyance unit to convey the stopped sheet toward the second portion, a screen for prompting the user to open the second conveyance path opening member. 
 
     
     
       3. An image forming apparatus according to  claim 1 , further comprising a conveying amount deciding portion configured to decide, based on the detection result of the sheet leading edge position detecting unit, a conveying amount by which the conveyance unit conveys the stopped sheet. 
     
     
       4. An image forming apparatus according to  claim 1 , further comprising a jam detector configured to detect that a sheet being conveyed by the conveyance unit is jammed on the conveyance path,
 wherein, in a case where the jam detector detects that the sheet is jammed, conveyance of the sheet by the conveyance unit is stopped. 
 
     
     
       5. An image forming apparatus according to  claim 1 , wherein, in the case where the determination unit determines to cause the conveyance unit to convey the stopped sheet toward the second portion, the conveyance unit does not convey the stopped sheet when the first conveyance path opening member is opened. 
     
     
       6. An image forming apparatus according to  claim 5 , wherein, the conveyance unit does not convey the stopped sheet even when the second conveyance path opening member is opened after the first conveyance path opening member is opened. 
     
     
       7. An image forming apparatus according to  claim 1 ,
 wherein the sheet leading edge position detecting unit comprises a sheet sensor configured to detect a presence or absence of the sheet at a predetermined position on the conveyance path, and 
 wherein the sheet leading edge position detecting unit is configured to detect the position of the leading edge of the sheet based on a conveyance time from a time when the sheet sensor detects the presence of the sheet from the absence of the sheet. 
 
     
     
       8. An image forming apparatus, comprising:
 a conveyance unit configured to convey a sheet on a conveyance path on which the sheet is conveyed; 
 a first door configured to open a first portion of the conveyance path by the first door being opened to allow a sheet to be removed from the first portion; 
 a second door configured to open a second portion downstream of the first portion of the conveyance path in a sheet conveyance direction by the second door being opened to allow a sheet to be removed from the second portion; 
 a sheet detector configured to detect a sheet on the conveyance path; 
 a jam detector configured to detect jamming of a sheet; and 
 a controller configured to determine a position of a sheet based on a detection result of the sheet detector in a case where the jamming of the sheet is detected by the jam detector, and to determine, based on a determined position of the sheet, one of not conveying the sheet, causing the conveyance unit to convey the sheet toward the first portion, and causing the conveyance unit to convey the sheet toward the second portion,
 wherein, in a case where the controller determines to cause the conveyance unit to convey the sheet toward the first portion, when the first door is opened, the controller controls the conveyance unit to convey the sheet so that the sheet is removed from the first portion which is opened, and 
 wherein, in a case where the controller determines to cause the conveyance unit to convey the sheet toward the second portion, when the second door is opened, the controller controls the conveyance unit to convey the sheet so that the sheet is removed from the second portion which is opened. 
 
 
     
     
       9. An image forming apparatus according to  claim 8 , further comprising a display portion configured to:
 display, in the case where the controller determines to cause the conveyance unit to convey the sheet toward the first portion, a screen for prompting a user to open the first door; and 
 display, in the case where the controller determines to cause the conveyance unit to convey the sheet toward the second portion, a screen for prompting the user to open the second door. 
 
     
     
       10. An image forming apparatus according to  claim 8 , wherein, in the case where the controller determines to cause the conveyance unit to convey the sheet toward the first portion, the controller determines, based on the determined position of the sheet, a conveying amount of the sheet to be conveyed after the first door is opened, and
 wherein, in the case where the controller determines to cause the conveyance unit to convey the sheet toward the second portion, the controller determines, based on the determined position of the sheet, a conveying amount of the sheet to be conveyed after the second door is opened. 
 
     
     
       11. An image forming apparatus according to  claim 8 , wherein, in the case where the controller determines to cause the conveyance unit to convey the sheet toward the second portion, even if the first door is opened, the controller controls the conveyance unit not to convey the sheet. 
     
     
       12. An image forming apparatus according to  claim 11 , wherein, even if the second door is opened after the first door is opened, the controller controls the conveyance unit not to convey the sheet. 
     
     
       13. An image forming apparatus according to  claim 8 , wherein the controller determines the position of the sheet based on a conveyance time from a time when the sheet detector detects the presence of the sheet from the absence of the sheet. 
     
     
       14. An image forming apparatus, comprising:
 a conveyance unit configured to convey a sheet on a conveyance path on which the sheet is conveyed; 
 a door configured to open a predetermined portion of the conveyance path by the door being opened to allow a sheet to be removed from the predetermined portion; 
 a door detector configured to detect opening and closing of the door; 
 a sheet detector, which is located upstream of the predetermined portion in a sheet conveyance direction, configured to detect a sheet on the conveyance path; 
 a jam detector configured to detect jamming of a sheet; and 
 a controller configured to determine not to convey a jammed sheet after the door is opened if a distance between the sheet detector and a leading edge of the jammed sheet is equal to or more than a predetermined distance, and determine to convey the jammed sheet to the predetermined portion when the door is opened if the distance between the sheet detector and the leading edge of the jammed sheet is less than the predetermined distance, in a case where the jamming of the sheet is detected by the jam detector, 
 wherein, in a case where the controller determines to cause the conveyance unit to convey the sheet toward the predetermined portion, when the opening of the door is detected by the door detector, the controller controls the conveyance unit to convey the sheet so that the sheet is removed from the predetermined portion which is opened. 
 
     
     
       15. An image forming apparatus according to  claim 14 , wherein the controller determines, based on the determined position of the sheet, a conveying amount of the sheet to be conveyed after the door is opened. 
     
     
       16. An image forming apparatus according to  claim 14 , wherein the controller determines the position of the sheet based on a conveyance time from a time when the sheet detector detects the presence of the sheet from the absence of the sheet.